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The heat evolved in the combustion of be...

The heat evolved in the combustion of benzene is given by
`C_(6)H_(6) (l) +7(1)/(2)O_(2)(g)rarr 3H_(2)O(l)+6CO_(2)(g), DeltaH =- 781.0 kcal mol^(-1)`
When `156g` of `C_(6)H_(6)` is burnt in a open container, the amount of heat energy released will be

A

`150.2 kcal mol^(-1)`

B

`1562.0 kcal mol^(-1)`

C

`6528.2 kJ mol^(-1)`

D

`2448.5 kJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B, C
`C_(6)H_(6)(l) + 7/2 O_(2)(g) rarr 3H_(2)O(l) + 6CO_(20)(g)`
`78g "of" C_(6)H_(6)` release = 781 kcal/mol`
`156 g of `C_(6)H_(6) "release" = 781/78 xx 156 = 1562 kcal//mol = 6528.2 kJ//mol`
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